CVE-2026-46166
published 2026-05-28CVE-2026-46166: In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: use safe list iteration in radar detect work The call to…
PriorityP343high8.8CVSS 3.1
AVAACLPRNUINSUCHIHAH
EPSS
0.20%
10.4th percentile
In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211: use safe list iteration in radar detect work
The call to ieee80211_dfs_cac_cancel can cause the iterated chanctx to
be freed and removed from the list. Guard against this to avoid a
slab-use-after-free error.
Affected
23 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | >= bca8bc0399ac2efd56e6adbed0307e10125a556c < 887ece6c23b49d02a6678e7a8d5ad213d75883ce | 887ece6c23b49d02a6678e7a8d5ad213d75883ce |
| linux | linux | >= bca8bc0399ac2efd56e6adbed0307e10125a556c < 7577a4b8a10fab45a6ee2045ea038a5adadbb585 | 7577a4b8a10fab45a6ee2045ea038a5adadbb585 |
| linux | linux | >= bca8bc0399ac2efd56e6adbed0307e10125a556c < 120149fb3ebcf674832ca3cafd32bedcdb686dde | 120149fb3ebcf674832ca3cafd32bedcdb686dde |
| linux | linux | >= bca8bc0399ac2efd56e6adbed0307e10125a556c < ac8eb3e18f41e2cc8492cc1d358bcb786c850270 | ac8eb3e18f41e2cc8492cc1d358bcb786c850270 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 6.12 < 6.12.88 | 6.12.88 |
| linux | linux_kernel | >= 6.13 < 6.18.30 | 6.18.30 |
| linux | linux_kernel | >= 6.19 < 7.0.7 | 7.0.7 |
| ubuntu | linux | — | — |
| ubuntu | linux-aws | — | — |
| ubuntu | linux-azure | — | — |
| ubuntu | linux-azure-fde | — | — |
| ubuntu | linux-gcp | — | — |
| ubuntu | linux-gke | — | — |
| ubuntu | linux-hwe-7.0 | — | — |
| ubuntu | linux-ibm | — | — |
| ubuntu | linux-oem-7.0 | — | — |
| ubuntu | linux-oracle | — | — |
| ubuntu | linux-raspi | — | — |
| ubuntu | linux-realtime | — | — |
CVSS provenance
nvdv3.18.8HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vendor_redhat7.0HIGH
vendor_ubuntu7.0HIGH
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VulDB
Linux Kernel up to 6.12.87/6.18.29/7.0.6/7.1-rc2 wifi ieee80211_dfs_cac_cancel use after free (EUVD-2026-32793)
vuldb·2026-06-11·CVSS 8.8
CVE-2026-46166 [HIGH] Linux Kernel up to 6.12.87/6.18.29/7.0.6/7.1-rc2 wifi ieee80211_dfs_cac_cancel use after free (EUVD-2026-32793)
A vulnerability classified as critical was found in Linux Kernel up to 6.12.87/6.18.29/7.0.6/7.1-rc2. This vulnerability affects the function ieee80211_dfs_cac_cancel of the component wifi. Executing a manipulation can lead to use after free.
This vulnerability appears as CVE-2026-46166. The attacker needs to be present on the local network. There is no available exploit.
Upgrading the affected component is advised.
GHSA
GHSA-pqxf-3wq6-69f8: In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211: use safe list iteration in radar detect work
The call to ieee802
ghsa_unreviewed·2026-05-28
CVE-2026-46166 GHSA-pqxf-3wq6-69f8: In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211: use safe list iteration in radar detect work
The call to ieee802
In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211: use safe list iteration in radar detect work
The call to ieee80211_dfs_cac_cancel can cause the iterated chanctx to
be freed and removed from the list. Guard against this to avoid a
slab-use-after-free error.
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2026-07-28·CVSS 7.0
CVE-2026-64231 [HIGH] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that some AMD Zen 2 processors did not properly isolate
shared resources in the operation cache. A local attacker could possibly
use this issue to corrupt instructions executed at a higher privilege
level, resulting in privilege escalation. (CVE-2025-54518)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- x86 platform drivers;
- Cryptographic API;
- PSP security protocol;
- ARM32 architecture;
- ARM64 architecture;
- MIPS architecture;
- PowerPC architecture;
- RISC-V architecture;
- S390 architecture;
- User-Mode Linux (UML);
- x86 archit
Ubuntu
Linux kernel (Azure) vulnerabilities
vendor_ubuntu·2026-07-24·CVSS 2.0
CVE-2026-64107 [LOW] Linux kernel (Azure) vulnerabilities
Title: Linux kernel (Azure) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that some AMD processors did not properly clear data in
the floating point divider unit during speculative execution. A local
attacker could use this to expose sensitive information. (CVE-2025-54505)
It was discovered that some AMD Zen 2 processors did not properly isolate
shared resources in the operation cache. A local attacker could possibly
use this issue to corrupt instructions executed at a higher privilege
level, resulting in privilege escalation. (CVE-2025-54518)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- x86 platfor
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2026-07-23·CVSS 7.0
CVE-2026-64107 [HIGH] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that some AMD Zen 2 processors did not properly isolate
shared resources in the operation cache. A local attacker could possibly
use this issue to corrupt instructions executed at a higher privilege
level, resulting in privilege escalation. (CVE-2025-54518)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- x86 platform drivers;
- PSP security protocol;
- ARM32 architecture;
- ARM64 architecture;
- MIPS architecture;
- PowerPC architecture;
- RISC-V architecture;
- S390 architecture;
- User-Mode Linux (UML);
- x86 architecture;
- Block layer
Ubuntu
Linux kernel (OEM) vulnerabilities
vendor_ubuntu·2026-07-20·CVSS 7.0
CVE-2026-46108 [HIGH] Linux kernel (OEM) vulnerabilities
Title: Linux kernel (OEM) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that some AMD Zen 2 processors did not properly isolate
shared resources in the operation cache. A local attacker could possibly
use this issue to corrupt instructions executed at a higher privilege
level, resulting in privilege escalation. (CVE-2025-54518)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- PSP security protocol;
- ARM64 architecture;
- PowerPC architecture;
- RISC-V architecture;
- S390 architecture;
- User-Mode Linux (UML);
- x86 architecture;
- Block layer subsystem;
- Cryptographic API;
- Intel NPU Driver;
- DRBD D
Ubuntu
Linux kernel (HWE) vulnerabilities
vendor_ubuntu·2026-07-20·CVSS 2.0
CVE-2026-46073 [LOW] Linux kernel (HWE) vulnerabilities
Title: Linux kernel (HWE) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that some AMD processors did not properly clear data in
the floating point divider unit during speculative execution. A local
attacker could use this to expose sensitive information. (CVE-2025-54505)
It was discovered that some AMD Zen 2 processors did not properly isolate
shared resources in the operation cache. A local attacker could possibly
use this issue to corrupt instructions executed at a higher privilege
level, resulting in privilege escalation. (CVE-2025-54518)
It was discovered that the Linux kernel did not properly handle shared page
fragments during socket buffer operations, collectively known as Dirty
Frag. A logic flaw existed in the XFRM ESP-in-TC
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2026-07-20·CVSS 7.0
CVE-2026-46113 [HIGH] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that some AMD Zen 2 processors did not properly isolate
shared resources in the operation cache. A local attacker could possibly
use this issue to corrupt instructions executed at a higher privilege
level, resulting in privilege escalation. (CVE-2025-54518)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- PSP security protocol;
- ARM64 architecture;
- PowerPC architecture;
- RISC-V architecture;
- S390 architecture;
- User-Mode Linux (UML);
- x86 architecture;
- Block layer subsystem;
- Cryptographic API;
- Intel NPU Driver;
- DRBD Distrib
Red Hat
kernel: wifi: mac80211: use safe list iteration in radar detect work
vendor_redhat·2026-05-28·CVSS 7.0
CVE-2026-46166 [HIGH] CWE-825 kernel: wifi: mac80211: use safe list iteration in radar detect work
kernel: wifi: mac80211: use safe list iteration in radar detect work
A flaw was found in the Linux kernel's mac80211 wireless subsystem. This vulnerability arises from unsafe list iteration during radar detection work, where a channel context can be freed while still being processed. This can lead to a use-after-free memory error. A successful exploit could result in system instability or a denial of service.
Package: kernel (Red Hat Enterprise Linux 10) - Affected
Package: kernel (Red Hat Enterprise Linux 6) - Under investigation
Package: kernel (Red Hat Enterprise Linux 7) - Not affected
Package: kernel-rt (Red Hat Enterprise Linux 7) - Not affected
Package: kernel (Red Hat Enterprise Linux 8) - Not affected
Package: kernel-rt (Red Hat Enterprise Linux 8) - Not affected
Package:
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/120149fb3ebcf674832ca3cafd32bedcdb686ddehttps://git.kernel.org/stable/c/7577a4b8a10fab45a6ee2045ea038a5adadbb585https://git.kernel.org/stable/c/887ece6c23b49d02a6678e7a8d5ad213d75883cehttps://git.kernel.org/stable/c/ac8eb3e18f41e2cc8492cc1d358bcb786c850270https://access.redhat.com/errata/RHSA-2026:27288https://access.redhat.com/errata/RHSA-2026:27708https://access.redhat.com/errata/RHSA-2026:27789https://access.redhat.com/errata/RHSA-2026:33215https://access.redhat.com/security/cve/CVE-2026-46166https://bugzilla.redhat.com/show_bug.cgi?id=2482645https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46166.json
2026-05-28
Published